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[PRESIDENT SAMUEL A. TAYLOR, . . . . District 3 . . . . PITTSBURGH, PA. PAST PRESIDENTS WILLIAM KELLY, District 5 . IRON MOUNTAIN, MICH. J. V. W. REYNDERS District 3., NEW YORK, N. Y. FIRST VICE-PRESIDENT E. DEGOLYER, NEW YORK, N. Y. TREASURER CHARLES F. RAND, NEW YORK, N. Y. SECRETARY H. FOSTER BAIN, NEW YORK, N. Y. ASSISTANT SECRETARY THOMAS T, READ, NEW YORK, N. Y.]

Jan 1, 1928

PRESIDENT WILLIAM L. SAUNDERS,1 NEW YORK, N. Y. PAST PRESIDENTS CHARLES F. RAID;1 NEW YORK N. Y. BENJAMIN B. THAYER,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT PHILIP N. MOORE,1 ST. Louis, Mo. TREASURER GEORGE C. STONE,1 NEW YORK, N. Y. SECRETARY EMERITUS ROSSITER W. RAYMOND NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON, NEW YORK, N. Y.

Jan 3, 1915

PRESIDENT. CHARLES F. RAND,1 NEW YORK, N. Y. PAST PRESIDENTS. CHARLES KIRCHHOFF,1 NEW YORK, N. Y. JAMES F. KEMP,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT. BENJAMIN B. THAYER,1 NEW YORK, N. Y. TREASURER. GEORGE C. STONE,1 NEW YORK, N. Y. SECRETARY EMERITUS. ROSSITER W. RAYMOND, ..... NEW YORK, N. Y. SECRETARY. BRADLEY STOUGHTON, NEW YORK, N. Y.

Jan 7, 1913

By John G. Banker, Arthur L. Forrest

Titanium solves corrosion, maintenance and environmental problems in many reactor and autoclave applications. Titanium clad construction permits autoclave designers a great deal of flexibility combined with significant cost reduction. Titanium alloys can be selectively applied in specific regions of the auto­clave to accommodate local environmental conditions. Resistance to general corrosion, crevice corrosion, abrasion, and ignition conditions can be accomplished selectively and eco­nomically. Explosion clad pressure vessel fabrication and perfor­mance have been proven through three decades of experience.

Jan 1, 1996

[PRESIDENT E. DEGOLYER, District 0 NEW YORK, N. Y. PAST PRESIDENTS J. V. W. REYNDERS, District 0 . NEW YORK, N. Y. SAMUEL A. TAYLOR, District 3 PITTSBURGH, PA. FIRST VICE-PRESIDENT GEORGE OTIS SMITH, District 4 .WASHINGTON, D. C.]

Jan 1, 1928

By Roberto Javier Santiago

The main properties of Calcium Carbide seem to be the grain size and the CaC2 content. This paper tries to describe the Calcium Carbide used in the South-American steel plants and how and where it is added.

Jan 1, 2006

By Kister H

Hoesch HUttenwerke AG, Dortmund, West Germany, is an integrated steel work of the Estel-group. The nominal annual production capacity-is about 7 Mio tons of steel. Hoesch has along experience in operation of diffe-rent types of slag granulation plants and of utilization of the granulated product. This experience is used to granulate a large amount of blast furnace slag and to process it in own cement plants and produce blast fur-nace cement.

Jan 1, 1979

By L. K. Smith, E. M. de Kock, J. van der Walt

A systematic approach to the analysis of alternative methods of ventilating and cooling large hot mines is presented. The important factors that have a bearing on ventilation and cooling requirements and practices, such as air flow through the mine, geographical distribution of eat loads, and micro-ventilation considerations, are dealt with. The analysis of these factors leads to definitive ventilation and cooling strategies, air and water process design, specifications of details, and designs of the associated plant and equipment.

Jan 1, 1983

By Freeman Bishop

The first session of the 91st term of Congress became so completely snarled up in economics and politics that no one knows how things will go in 1970 including the White House. Everything from mineral depletion allowances to tax deferments kept the Republican President and the Democratic Congress from settling their differences. But as these reconcilements approach definition, a new battleground develops around the President's authority to make trade and tariff adjustments.

Jan 1, 1970

By Bucknell WR, Clarke DE

The paper provides a company's view of the relative merits of various valuation methods and outlines the basic approach it takes to the valuation of an exploration property. The negotiating process and methods of acquiring an interest in an exploration property is discussed The valuation methods discussed are: 1. Exploration Expenditure. 2. Real Estate. 3. Joint Venture Terms. 4. Rule of Thumb. 5. Net Present Value - Discounted Cash Flow. 6. Geoengineering.

Jan 1, 1994

By H. S. Munroe

The accompanying figures illustrate the dumping-device used at the new dressing works of the St. Joseph Lead Co., at Bonne Terre, Mo. It is a dumping-cradle, of a type much used abroad, in which the car is turned upside down to discharge its load. The main

Jan 1, 1889

By J Lyall Workman, Peter N. Calder

"Presplitting is a technique mines and quarries may use to produce high quality final pitwalls. Damage from backbreak can be minimized, thereby insuring the final pit walls standat the designed angle. Thus costly excess waste removal is avoided. Safety in the pit isenhanced. Control blasting is an essential component of procedures to maintain the stabilityof final pit walls prone to failure."

Jan 1, 1993

By Baron Fidler, Dave Lilly, Matt Budin

Cumulative sum (CUSUM) statistical process control methods have been used in many industries to monitor quality control results. CUSUM charts are a method to determine when small changes in data indicate a major change in results. E.S. Page at AT&T developed the method in 1954. In many blasting situations, vibration and air blast readings vary slightly from blast to blast. Whether the change is significant or not can be hard to interpret from the raw data. CUSUM charts can assist in determining whether a major change is taking place and when the change began.

Jan 1, 2009

By H. White

The applicability of ground penetrating radar (GPR) in numerous qualitative applications has been demonstrated over the past five years in the South African mining industry. These applications include the delineation of faults and dykes, fracture mapping, delineation of shear zones, mapping of depth of weathering, and the delineation of contact between different rock types. The qualitative nature of the data collected using existing commercial GPR systems, often relying on expert interpretation, has however mitigated against the full scale routine application of GPR in the mining industry. The recent development of the RockRadar system by ISS International has, to a large extent, overcome these problems. The result is that quantitative rock-mass studies can now be performed with the RockRadar system.

Jan 1, 1996

By Alfred G. Hoyl

The small miner and small mine have an important role to play in the finding, developing and production of our mineral resources. "Help, not hinder" must be our byword. We must push in every way we can devise to change the adversary position of government and environmental movements. We need the small mines and they must be encouraged, not hindered. Technically excellent and adequate equipment is available, and needed information is also available to the small operation. Environmental questions and problems must be fully considered regardless of the size of a mining operation.

Jan 1, 1987

By Stanley Dempsey

Mine developers commonly undertake projects that require more funds than they can invest themselves. From that point until they are able to complete a "bankable" feasibility study, they require access to venture capital. In the United States, most venture capital has been provided to the small mining segment of the industry through tax advantaged limited partnerships. Recent changes in Federal tax law makes other forms of financing competitive, and the use of corporations and private and public offerings of shares may soon become more popular ways of securing venture capital. A number of new financial services firms have entered the mining finance business in recent years. They provide mine developers with access to venture capital.

Jan 1, 1987

By L M. Stodart

In the increasingly competitive environment of the 1990's, there is a need to provide the users of explosives with accurate and immediate information. Research has shown that information technology alone will not provide companies with a sustainable competitive advantage. However, where information technology is used to assist the development and enhance the performance, of the employee sustainable competitive advantage can occur. A Performance Support System is a tool that combines explosive's theory, government regulations, and site specific knowledge in an easily accessible computer program. In this paper five areas are addressed where a Performance Support System can assist the user: as a reference source, in an assistant or advisory role, as a instruction aid, in regulatory compliance, and as an operations monitor.

Jan 1, 1993

By Juliana G. Gutierrez-Paredes, Gabriel Plascencia-Barrera, Fidel Reyes-Carmona

In Mexico, many tonnes of nickel from waste petrochemical catalysts are dumped every year. In order to recover all that nickel, a hydrometallurgical reactor was designed. This design was performed in a systematical fashion, which included the chemistry of the system under study, both a kinetic and mass transfer study, and finally the use of the RID function, to optimize the reactor size. It was found that the NiO leaching with sulfuric acid is well represented by a first order reaction. The mass transfer results are in good agreement with the experimental results, obtaining over 95% nickel extraction in both cases. A marketing study was also completed that determined that it is possible to make a good profit by processing this residue provided the capital cost was low.

Jan 1, 2000

By Chen Bingchen, Ma Shaojian

A new magnetic liner, with unique magnetic circuit and novel structure designs, was developed. It was characterized by light weight, low noise, as well as corrosive and abrasive resistance. The wear rate of the magnetic liner was one twentieth and one ninth those of the manganese-alloy steel and rubber ones respectively. The forming mechanism of the protective layer and that of influencing factors on magnetic liners were also investigated. The research results could not only instruct using magnetic liner, but also widen their application.

Jan 1, 1995

By C A. "Hawk" Hanger

"The paper that will be presented is an in-depth study of sequential blasting using standardnon-electric shock tube down hole timing along with surface M.S. connector timing.Included also will be a discussion on the advantages in fragmentation, digability, oredilution' and ground vibration versus the common practice of row by row blasting. Alongwith the written presentation, several visual illustrations will be included. The visuals willrefine the actual direction and predicted movement of the shot involved."

Jan 1, 1993